[Openswan Users] Tunnel goes down for no reason

Roland Plüss roland at rptd.ch
Sat Sep 8 13:19:30 EDT 2007

>>> If you are doing NAT-Traversal, your NAT router might be timing out the
>>> port mapping.
>> No, this should not be the case. I have the following setup:
>> company/home ( both the same ):
>> - ADSL router set to forward all connections to the server ( hence a 1:1
>> mapping sort of )
> That is NAT, and your NAT router will keep and expire state.
Now I'm confused. I have a 1:1 mapping hence I simply forward all
traffic to the server. I do not want to have any NAT state in this one
since my server is doing all the NATing and IPtabling.
>> - Gentoo server with OpenSwan with iptables set to not masquerade the
>> VPN traffic
> If they have public ips right, if they have private ip's, there is NAT
> state.
One has a static public and registered IP. The other has a dynamic one (
did not get around to request a static IP yet ).
>>> You have to first figure out why it is going down. Are both sides openswan?
>>> If both end support DPD, you can enable that.
>> What is DPD in OpenSwan?
> Dead Peer Detection, see dpdaction=,dpdaction=,dpdtimeout.
So for my case I would need dpdaction=restart, dpdtimeout=60 and
dpddelay=30 . But the man page says I need to activate dpd for a
connection. How am I supposed to do this? I found nothing in the man
page about it.

Yours sincerely
Plüss Roland

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